Hi,
I have been trying to use valgrind with Fedora 15 and I find that I am
not getting the complete backtrace information. Let me provide a simple
example:
/* file test.c */
#include <stdio.h>
int main(void) {
int i;
fprintf(stderr, "i = %d\n", i);
} /* main */
Compile with:
gcc -o -g test test.c
Then I run valgrind on Fedora 15, and here is what I get. (I also
provide the output for Ubuntu 10.04 for comparison.) How can I get more
complete backtrace information using Fedora?
(Not that I am not interested in debugging the above sample program, but
for finding out why valgrind for me does not provide more complete
backtrace information.)
Thanks a lot in advance!
Best wishes,
Ranjan
Output of valgrind on Fedora 15:
$ valgrind ./test
==31745== Memcheck, a memory error detector
==31745== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==31745== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info
==31745== Command: ./test
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x35: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x35: ???
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x3630: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x3630: ???
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x363136: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x363136: ???
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x36313732: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x36313732: ???
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x31373334: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x31373334: ???
==31745==
==31745== Use of uninitialised value of size 4
==31745== at 0x4692BA88: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x37333532: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692BA91: _itoa_word (in /lib/libc-2.14.so)
==31745== by 0x37333532: ???
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692D177: vfprintf (in /lib/libc-2.14.so)
==31745== by 0x46930D7A: buffered_vfprintf (in /lib/libc-2.14.so)
==31745== by 0x469367AE: fprintf (in /lib/libc-2.14.so)
==31745== by 0x46903412: (below main) (in /lib/libc-2.14.so)
==31745==
==31745== Conditional jump or move depends on uninitialised value(s)
==31745== at 0x4692CCD1: vfprintf (in /lib/libc-2.14.so)
==31745== by 0x46930D7A: buffered_vfprintf (in /lib/libc-2.14.so)
==31745== by 0x469367AE: fprintf (in /lib/libc-2.14.so)
==31745== by 0x46903412: (below main) (in /lib/libc-2.14.so)
==31745==
i = 1185353716
==31745==
==31745== HEAP SUMMARY:
==31745== in use at exit: 0 bytes in 0 blocks
==31745== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==31745==
==31745== All heap blocks were freed -- no leaks are possible
==31745==
==31745== For counts of detected and suppressed errors, rerun with: -v
==31745== Use --track-origins=yes to see where uninitialised values come from
==31745== ERROR SUMMARY: 22 errors from 16 contexts (suppressed: 12 from 8)
Output of valgrind on Ubuntu 10.04:
==29914== Memcheck, a memory error detector
==29914== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==29914== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==29914== Command: ./test
==29914==
==29914== Use of uninitialised value of size 8
==29914== at 0x4E71E4B: _itoa_word (_itoa.c:195)
==29914== by 0x4E73138: vfprintf (vfprintf.c:1613)
==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
==29914== by 0x4E7D497: fprintf (fprintf.c:33)
==29914== by 0x40058A: main (test.c:5)
==29914==
==29914== Conditional jump or move depends on uninitialised value(s)
==29914== at 0x4E71E55: _itoa_word (_itoa.c:195)
==29914== by 0x4E73138: vfprintf (vfprintf.c:1613)
==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
==29914== by 0x4E7D497: fprintf (fprintf.c:33)
==29914== by 0x40058A: main (test.c:5)
==29914==
==29914== Conditional jump or move depends on uninitialised value(s)
==29914== at 0x4E74FB1: vfprintf (vfprintf.c:1613)
==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
==29914== by 0x4E7D497: fprintf (fprintf.c:33)
==29914== by 0x40058A: main (test.c:5)
==29914==
==29914== Conditional jump or move depends on uninitialised value(s)
==29914== at 0x4E73226: vfprintf (vfprintf.c:1613)
==29914== by 0x4E778DF: buffered_vfprintf (vfprintf.c:2254)
==29914== by 0x4E725AD: vfprintf (vfprintf.c:1306)
==29914== by 0x4E7D497: fprintf (fprintf.c:33)
==29914== by 0x40058A: main (test.c:5)
==29914==
i = 0
==29914==
==29914== HEAP SUMMARY:
==29914== in use at exit: 0 bytes in 0 blocks
==29914== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==29914==
==29914== All heap blocks were freed -- no leaks are possible
==29914==
==29914== For counts of detected and suppressed errors, rerun with: -v
==29914== Use --track-origins=yes to see where uninitialised values come from
==29914== ERROR SUMMARY: 4 errors from 4 contexts (suppressed: 4 from 4)
--
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